sata_mv ncq Add want ncq parameter for EDMA configuration
An extra EDMA config bit is required for NCQ operation. So set/clear it as needed, and cache current setting in port_priv. For now though, it will always be "off" (0). Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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0c58912e
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